@article {Sieving163,
author = {P A Sieving and G A Fishman},
title = {Refractive errors of retinitis pigmentosa patients.},
volume = {62},
number = {3},
pages = {163--167},
year = {1978},
doi = {10.1136/bjo.62.3.163},
publisher = {BMJ Publishing Group Ltd},
abstract = {A retinitis pigmentosa (RP) population (268 eyes) had predominantly myopic refractive errors. Whereas 12\% of a normal population have myopic refractions, myopia was found in 75\% of 268 eyes of RP patients and in 95\% of 41 eyes of X-linked RP patients. The spherical errors describe a single-peaked, skewed distribution, with a mean of -1.86 dioptres that is significantly (P less than 0.001) more myopic, by -2.93 D, than that of a normal population. The X-linked genetic group has a spherical mean of -5.51 D that is significantly (P less than 0.01) more myopic than the non-X-linked RP population. This X-linked spherical error distribution may be composed of two separate subdistributions. Astigmatic refractive errors greater than 0.5 D are found in 47\% of this RP population, considerably in excess of the 19\% of a normal population with such astigmatic errors.},
issn = {0007-1161},
URL = {https://bjo.bmj.com/content/62/3/163},
eprint = {https://bjo.bmj.com/content/62/3/163.full.pdf},
journal = {British Journal of Ophthalmology}
}